Electric power system differential protection with DC compensation

A system for differential protection of electrical equipment of an electric power delivery system, comprising:

• a sensor component to receive current signals from a first end of the electrical equipment and current signals from a second end of the electrical equipment;
• a differential protection element in communication with the sensor component configured to:
• calculate an operate current from the current signals from the first end and the current signals from the second end;
• calculate a restraint current from the current signals from the first end and the current signals from the second end;
• calculate a compensated operating signal from the operate current, the current signals from the first end, and the current signals from the second end;
• determine a differential fault condition of the electrical equipment using the restraint current and the compensated operating signal;
• and,
• assert a fault signal upon determination of the differential fault condition;
• and
• a tripping subsystem in communication with the differential protection element configured to effect a protective action of the electrical equipment upon assertion of the fault signal from the differential protection element.